CN117630095A - Sensor, channel and fuel cell system - Google Patents
Sensor, channel and fuel cell system Download PDFInfo
- Publication number
- CN117630095A CN117630095A CN202311045062.XA CN202311045062A CN117630095A CN 117630095 A CN117630095 A CN 117630095A CN 202311045062 A CN202311045062 A CN 202311045062A CN 117630095 A CN117630095 A CN 117630095A
- Authority
- CN
- China
- Prior art keywords
- channel
- sensor
- measuring chamber
- fuel cell
- cell system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 29
- 239000012528 membrane Substances 0.000 claims abstract description 19
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 11
- 239000001257 hydrogen Substances 0.000 claims abstract description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/005—H2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0444—Concentration; Density
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0444—Concentration; Density
- H01M8/04462—Concentration; Density of anode exhausts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a sensor, a channel and a fuel cell system. In particular, it relates to a sensor (4 a) for determining the hydrogen concentration in a channel (3 a) of a fuel cell system (2), comprising a sensor housing (6), a measurement chamber arranged in the sensor housing (6), and a measurement chamber channel fluidly connecting the measurement chamber with the environment of the sensor (4 a), the sensor (4 a) being mountable such that a measurement chamber membrane is located in the channel (3 a). The invention also relates to a channel (3 a) having such a sensor (4 a) and to a fuel cell system (2) having such a channel (3 a).
Description
Technical Field
The present invention relates to a sensor, a channel having such a sensor, and a fuel cell system having such a channel.
Background
The sensor for determining the hydrogen concentration in the channels of the fuel cell system is typically arranged outside the channels so as to be out of the way from the complicated measurement conditions within the channels. For this purpose, a heating process is often required before the sensor is started to operate each time, in order to avoid moisture which may affect the measuring process.
Document US 6 668 B1 discloses a carbon monoxide sensor.
The prior art devices have the disadvantage, inter alia, that before each start of operation, it is costly to avoid that humidity has an influence on the measuring process.
Disclosure of Invention
The object of the present invention is to provide an alternative sensor which is characterized in particular in that the heating process can be omitted before the measuring process with the sensor. It is a further object to provide a channel with such a sensor. Further, it is another object to provide a fuel cell system having such a channel.
The first object is achieved by a sensor having the features of claim 1.
One embodiment of the invention relates to a sensor for determining a hydrogen concentration in a channel of a fuel cell system, wherein the sensor has a sensor housing, a measurement chamber and a measurement chamber passage, wherein the measurement chamber is arranged in the sensor housing, wherein the measurement chamber passage fluidly connects the measurement chamber with an environment of the sensor, wherein the sensor is mountable such that the measurement chamber is located in the channel.
By the sensor being able to be mounted such that the measuring chamber is located in the channel, a separate heating process before the sensor starts to operate can be dispensed with, since the flow of substance/stream in the channel can be used to heat the sensor. In this way, the negative effects of humidity on the measuring process are avoided even in the absence of a separate heating process before the sensor starts to operate.
It is particularly advantageous if the sensor is a thermal sensor. In other words, the sensor comprises a heating element and a temperature detector, which are arranged in particular inside the measuring chamber. Based on the hydrogen concentration in the measuring chamber, a temperature change can be determined during the heating process by means of the heating element by means of the temperature sensor, from which the hydrogen concentration in the measuring chamber can be determined. The measurement process is based mainly on the high heat capacity of hydrogen, compared to the composition of other gases whose hydrogen concentration should be determined.
It is also advantageous that the channel is an exhaust channel of a fuel cell system. Furthermore, it is advantageous if the fuel cell system is a fuel cell system for a motor vehicle.
It is particularly advantageous if the measuring chamber channel connects the measuring chamber in fluid connection with the environment of the sensor housing.
It is furthermore preferred that the sensor can be mounted such that the measuring chamber channel and/or the sensor housing is arranged in the channel.
It is particularly advantageous if the sensor can be mounted such that the measuring chamber channel fluidically connects the measuring chamber with the channel.
It is particularly preferred that the measuring chamber is fluidly connectable to the channel via a measuring chamber passage.
A preferred embodiment is characterized in that the measuring chamber channel is closed by a membrane and that the membrane is gas-permeable and liquid-impermeable. This reliably prevents liquid from entering the measuring chamber from the channel, thereby further reducing the humidity in the measuring chamber.
It is also preferred that the diaphragm is connected or fixed to the sensor housing in a material-locking manner, for example by means of an adhesive or welding. In particular, the connection or fixation is designed to prevent bypass flow from bypassing the diaphragm into the measurement chamber. Thereby preventing liquid from entering the measuring chamber.
Furthermore, it is advantageous if the sensor can be mounted such that the diaphragm is arranged in the channel.
A further preferred embodiment is characterized in that the measuring chamber channel opens into a measuring chamber opening and that the measuring chamber opening is arranged at the surface of the sensor housing.
A further preferred embodiment is characterized in that the measuring chamber opening is closed by a membrane. Thereby preventing liquid from penetrating into the measuring chamber passageway. At the same time, the membrane is arranged on the surface of the sensor housing, so that when the sensor is arranged in the channel, the membrane is arranged such that the flow of matter within the channel cleans the membrane and blows away the liquid droplets. Furthermore, the mounting or fixing of the membrane in this arrangement of the membrane is particularly simple.
A further preferred embodiment is characterized in that the sensor comprises a flow influencing geometry influencing the flow of the substance in the channel.
It is also preferred that the flow influencing geometry is arranged in the channel against the flow direction of the substance flow, as seen from the measuring chamber opening, when the sensor is installed.
Furthermore, it is advantageous if the flow influencing geometry is formed integrally, in particular in one piece, with the sensor housing. This is an extremely low cost solution.
It is furthermore advantageous if the flow influencing geometry adjoins the measuring chamber opening directly.
It is also expedient if the flow influencing geometry is designed such that, when the sensor is installed, the flow of material in the channel is deflected towards the measuring chamber opening and/or the diaphragm. Whereby the measuring chamber opening and/or the membrane is kept clean by the material flow.
Furthermore, it is advantageous if the flow influencing geometry is designed such that when the sensor is installed, the flow influencing geometry swirls the flow of material in the channel. Whereby the measuring chamber opening and/or the membrane is kept clean by the material flow.
A further preferred embodiment is characterized in that the measuring chamber channel is configured linearly, in a bent manner or is configured as a labyrinth. In particular, when producing by means of injection molding, a straight construction is particularly advantageous and simple, whereas a bent construction or construction as a labyrinth is particularly helpful, whereby liquid is prevented from entering the measuring chamber, in particular when the diaphragm is damaged or not provided.
In terms of channels, the object of the invention is achieved by a channel for a fuel cell system, which channel has a sensor according to the invention, wherein the sensor is arranged in the channel. Preferably, the sensor is located partially or completely in the channel. Furthermore, it is preferred that the measuring chamber opening is located in the channel. It is furthermore preferred that the measuring chamber channel is located wholly or partly in the channel. It is particularly advantageous if the sensor housing is located partially or completely in the channel. It is furthermore preferred that the channel is an exhaust channel. Furthermore, the channel is preferably circular or has a circular cross section.
Furthermore, the channel is advantageously made of metal, in particular stainless steel or plastic.
It is particularly preferred that the measuring chamber channel fluidly connects the measuring chamber with the channel.
A further preferred embodiment is characterized in that the sensor housing, the measuring chamber channel, the diaphragm and/or the measuring chamber opening intersect a plane center vector, wherein the plane center vector extends through the plane center of the channel cross section of the channel, wherein the channel cross section lies in a plane extending perpendicular to the longitudinal direction of the channel and intersects the sensor, and wherein the plane center vector intersects the plane perpendicularly. Furthermore, it is particularly preferred that the plane centre vector intersects at least one, two, three, four or five of the following components of the sensor: the sensor housing, the measurement chamber passageway, the diaphragm, and the measurement chamber opening. Particularly preferably, the area center vector extends at intervals from at least one, two, three, four or five of the following components of the sensor: a sensor housing, a measurement chamber passageway, a diaphragm, and a measurement chamber opening. In other words, the components of the sensor either intersect the vector or are arranged at intervals from the vector. By spaced arrangement is meant that the components do not intersect the vector. The longitudinal direction refers in particular to the flow direction of the gas inside the channel (along which the gas can flow) or to the extension direction of the channel.
Also advantageously, the channels are exhaust channels of a fuel cell system. Furthermore, the fuel cell system is advantageously a fuel cell system for a motor vehicle.
A further preferred embodiment is characterized in that the sensor is arranged in the channel such that the plane center vector intersects another plane at an angle of 70 ° to 110 °, in which another plane a diaphragm or a measuring chamber opening is arranged.
A further preferred embodiment is characterized in that the sensor is arranged such that the diaphragm is at least partially opposite to the flow direction. In other words, the sensor is arranged such that the membrane faces the flow of substance in the channel. With this arrangement it is possible for the substance flow to clean the membrane or to remove liquid droplets from the membrane.
A further preferred embodiment is characterized in that the sensor is fixed to the channel wall of the channel. Particularly preferably, the sensor is fixed by means of a thread pair comprising an external thread on the sensor housing and an internal thread in the channel wall. In this way, the installation of the sensor is particularly simple and time-saving.
It is furthermore particularly preferred if the sensor housing has a thermal insulation at the fastening point of the sensor to the channel wall. In this way temperature cooling of the sensor through the channel wall is avoided. This helps not to accumulate droplets on the sensor or the sensor housing.
One or another of the foregoing embodiments is characterized in that the sensor extends from outside the channel into the channel through an opening in the channel wall. In this way, the sensor may be flanged onto the channel wall.
The object concerning the fuel cell system is achieved by a fuel cell system having a channel according to the invention. This provides a fuel cell system that can eliminate a separate operation process before the sensor starts to operate. Furthermore, it is advantageous if the fuel cell system is a fuel cell system for a motor vehicle.
Furthermore, it is particularly preferable to provide a motor vehicle having such a fuel cell system.
Advantageous developments of the invention are described in the dependent claims and in the following description of the figures.
Drawings
The invention is explained in detail below with reference to the figures by means of examples. In the accompanying drawings:
figure 1 shows a motor vehicle with a fuel cell system,
FIG. 2 shows a channel with a sensor, and
fig. 3 shows a channel with a sensor.
Detailed Description
Fig. 1 shows a motor vehicle 1 with a fuel cell system 2 according to the invention. The motor vehicle relates to a motor vehicle 1 having an electric drive. The fuel cell system 2 comprises a channel 3a with a sensor 4a according to the invention, which is designed as a thermodynamic sensor 4a, in order to determine the hydrogen concentration in the channel 3 a.
Fig. 2 shows a section perpendicular to the flow direction in the channel 3a and extending perpendicular to the direction of extension of the channel. In other words, a channel cross section is shown, which lies in a plane extending perpendicular to the longitudinal direction of the channel 3 a. The cross section is an X-Y plane. The channel 3a has a circular cross-section with a face center 3c located at the center of the circular cross-section of the channel 3 a. Furthermore, the channel 3a has a channel wall 3b made of stainless steel with a constant wall thickness. Furthermore, a sensor 4b for determining the hydrogen concentration is shown, which is known from the prior art, is located outside the channel 3a and is fixed to the channel wall 3b. The sensor 4b is in fluid connection with the channel 3a through an opening in the channel wall 3b. Because the sensor 4b is located outside the channel 3a, the sensor 4b is largely thermally decoupled from the material flow in the channel 3 a.
Fig. 3 shows the same circular channel 3a in fig. 2, but with a sensor 4a according to the invention, which sensor 4a is fixed to the channel wall 3b and extends from the outside of the channel 3a through an opening in the channel wall 3b to the inside of the channel 3 a. The view is a longitudinal section of the channel 3a in the Z-Y plane. The channel 3a extends in the Z-direction, whereby the flow of material within the channel 3a also extends in the Z-direction. The sensor 4a shown here is the sensor 4a shown in fig. 1. The sensor 4a is fastened to the channel wall 3b by means of threads, not shown in detail here, and also has an elastomer seal to prevent gas from escaping from the interior of the channel. The sensor 4a comprises a sensor housing 6 in which a measuring chamber is arranged. A heating element and a temperature sensor are disposed in the measurement chamber to measure the hydrogen concentration in the measurement chamber. The measuring chamber is in fluid connection with the channel by means of a measuring chamber passage into the measuring chamber opening. The measuring chamber opening is arranged at the surface of the sensor housing 6 and is covered by the diaphragm 5. The membrane 5 is constructed to be breathable and impermeable to liquids. The sensor housing 6 is made of a material having high thermal conductivity.
The features of the embodiments of fig. 1 and 3 are in particular non-limiting and serve to illustrate the inventive idea.
List of reference numerals:
1 Motor vehicle
2 Fuel cell System
3a channel
3b channel wall
Center of 3c plane
4a sensor
4b sensor
5 film sheet
6 sensor housing
Claims (13)
1. A sensor (4 a) for determining the hydrogen concentration in a channel (3 a) of a fuel cell system (2),
the sensor comprises a sensor housing (6), a measuring chamber arranged in the sensor housing (6), and a measuring chamber passage fluidly connecting the measuring chamber with the environment of the sensor (4 a),
the sensor (4 a) can be mounted such that the measuring chamber is located in the channel (3 a).
2. The sensor (4 a) according to claim 1, wherein the measuring chamber passage is closed by a membrane, the membrane being gas permeable and liquid impermeable.
3. The sensor (4 a) according to claim 1 or 2, characterized in that the measuring chamber passage opens into a measuring chamber opening, which is arranged on the surface of the sensor housing.
4. The sensor (4 a) according to any of the preceding claims, wherein the measuring chamber opening is closed by a membrane.
5. The sensor (4 a) according to any of the preceding claims, characterized in that the sensor comprises a flow influencing geometry influencing the flow in the channel.
6. The sensor (4 a) according to any of the preceding claims, wherein the measuring chamber passageway is configured in a straight form, a bent form or a labyrinth form.
7. A channel (3 a) for a fuel cell system having a sensor according to any of the preceding claims, characterized in that the sensor is arranged in the channel.
8. Channel (3 a) according to claim 7, characterized in that the sensor housing (6), the measuring chamber, the diaphragm (5), the measuring chamber passageway and/or the measuring chamber opening intersect a plane center vector, which passes through the plane center (3 c) of the channel cross section of the channel (3 a), which lies in a plane extending perpendicular to the longitudinal direction of the channel (3 a) and intersects the sensor (4 a), which plane center vector intersects said plane perpendicularly.
9. Channel (3 a) according to claim 8, characterized in that the sensor (4 a) is arranged in the channel (3 a) such that the plane centre vector intersects the other plane in which the diaphragm (5) or the measuring chamber opening is arranged at an angle of 70 ° to 110 °.
10. Channel (3 a) according to any of claims 7 to 9, characterized in that the sensor (4 a) is arranged such that the membrane (5) is at least partially opposite to the flow direction.
11. Channel (3 a) according to any of claims 7 to 10, characterized in that the sensor (4 a) is fixed to the channel wall (3 b) of the channel (3 a).
12. The channel (3 a) according to any one of claims 7 to 11, characterized in that the sensor (4 a) extends from outside the channel (3 a) into the channel (3 a) through an opening in the channel wall (3 b).
13. A fuel cell system (2) having a channel (3 a) according to any one of claims 7 to 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022208864.6 | 2022-08-26 | ||
| DE102022208864.6A DE102022208864A1 (en) | 2022-08-26 | 2022-08-26 | Sensor, channel and fuel cell system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117630095A true CN117630095A (en) | 2024-03-01 |
Family
ID=89844697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311045062.XA Pending CN117630095A (en) | 2022-08-26 | 2023-08-18 | Sensor, channel and fuel cell system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20240068969A1 (en) |
| CN (1) | CN117630095A (en) |
| DE (1) | DE102022208864A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001025777A1 (en) | 1999-10-01 | 2001-04-12 | Matsushita Electric Industrial Co. Ltd. | Carbon monoxide sensor |
| JP5113391B2 (en) | 2007-01-19 | 2013-01-09 | 本田技研工業株式会社 | Gas sensor |
| JP6021761B2 (en) | 2013-08-27 | 2016-11-09 | 日立オートモティブシステムズ株式会社 | Gas sensor device |
-
2022
- 2022-08-26 DE DE102022208864.6A patent/DE102022208864A1/en active Pending
-
2023
- 2023-08-18 CN CN202311045062.XA patent/CN117630095A/en active Pending
- 2023-08-25 US US18/237,983 patent/US20240068969A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022208864A1 (en) | 2024-02-29 |
| US20240068969A1 (en) | 2024-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8549901B2 (en) | Sensor structure | |
| JP5049996B2 (en) | Thermal flow meter | |
| US7810375B2 (en) | Sensor | |
| CA2485605C (en) | Method of starting, stopping and operating gas sensor with built-in heater | |
| US6851309B2 (en) | Device for determining at least one parameter of a flowing medium | |
| US9188073B2 (en) | Method and device for diagnosing deviations in a single cylinder lambda control | |
| JP2008304232A (en) | Intake air flow measuring apparatus | |
| KR20140022397A (en) | Sensor apparatus for detecting a parameter of a flowing fluid medium | |
| US20070277605A1 (en) | Shield assembly for a gas sensor | |
| JP2008249684A (en) | Gas sensor device | |
| CN117630095A (en) | Sensor, channel and fuel cell system | |
| US7401509B2 (en) | Device for determining air mass in a line and including a separation outlet having a wind shield structure | |
| JP2013083453A (en) | Humidity detector | |
| US9903847B2 (en) | Sensor device for detecting a moisture content of a flowing fluid medium | |
| CN113597538B (en) | Physical quantity detecting device | |
| US7418855B2 (en) | Gas sensor and control method therefor | |
| US6383355B1 (en) | Gas sensor | |
| CA2424105C (en) | Installation structure for gas sensor | |
| JP2005533957A (en) | Device for calculating the exhaust gas recirculation rate of an internal combustion engine | |
| JP2010237007A (en) | Gas sensor | |
| CN118159825A (en) | Sensor for detecting at least one property of a fluid medium in a measuring chamber | |
| CN111855515A (en) | Sensor device for detecting gas volume of sample | |
| JP2009277594A (en) | Fuel cell vehicle | |
| JPH08152383A (en) | Gas concentration measuring instrument | |
| JP5462114B2 (en) | Heating resistor type air flow measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |